I can't *believe* these lazy developers keep making file sizes so damn large. Btw, how does technology work?

Ignoring whatever this service turns out to be - what's the best way to play PS2? I've always wanted to give it a shot - I've heard the story and setting is bonkers and supremely ambitious, which is right up my alley. Does it truly hold up even today?

For reference, my favorite RPGs ever would be FFIX and KOTOR - both because of their amazing worlds and stories.